%0 Journal Article
%T Time telescope for the expanding of ultrashort pulses<br>用于超短脉冲扩展的时间望远镜
%A Xu Guang
%A Qian Lie-Ji
%A Wang Tao
%A Zhu He-Yuan
%A Fan Dian-Yuan
%A <br>徐光
%A 钱列加
%A 王韬
%A 朱鹤元
%A 范滇元
%J 物理学报
%D 2004
%I 
%X In this paper we have theoretically investigated the time telescope that offers a function of pulse expanding. Time telescope, with features of high efficiency and near Fourier-transform limit, is constructed mainly by using nonlinear parametric conversions of chirped pulses. Based on both analytical and numerical studies, it is found that group-velocity mismatch of the nonlinear crystal plays an important role in temporal aberration and conversion efficiency, and the criteria for designing a near aberration-free telescope are summarized. Finally, it is experimentally demonstrated that a 70fs short pulse is expanded to a 60ps long pulse near Fourier-transform limit.
%K chirped pulse
%K telescope
%K optical parametric amplification<br>啁啾脉冲，
%K 望远镜，
%K 光参量放大
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=F4EE6AD45608F53A&yid=D0E58B75BFD8E51C&vid=8E6AB9C3EBAAE921&iid=CA4FD0336C81A37A&sid=39EEF47180459690&eid=10F298ED9F164662&journal_id=1000-3290&journal_name=物理学报&referenced_num=0&reference_num=15